I think that the scope of government has grown so big that it's impossible for representatives to know what's going on, let alone understand the domains. The problem is they're trying to do too much.
What generally happens is people who don’t understand or know effectively become random “noise” and cancel each other out. Then those who are informed/care become the “signal” and you get a pretty good representative decision in the end. Better than with politician I’d say. It’s kind of like “ask the audience” in who wants to be a millionaire..
